CPA-325S Hydrostatic Level Probe
The CPA-325S is a heavy-duty hydrostatic level transmitter purpose-built for the continuous and accurate measurement of liquid levels in highly contaminated media. Designed for the most demanding industrial and municipal environments, the CPA-325S excels where standard probes fail, in wastewater, sludge, fermentation tanks, settling basins, and liquids loaded with abrasive particles such as sand and silt.
At the heart of the CPA-325S is its enlarged Ø76 mm separator housing a thickened Ø48 mm stainless steel diaphragm. This robust membrane construction dramatically reduces the influence of sediment build-up and clogging, ensuring stable, drift-free readings even in aggressive or particle-laden liquids. The diaphragm is easy to maintain, a gentle rinse with water is enough to restore peak performance, eliminating costly downtime and frequent recalibration.
Constructed entirely from stainless steel (316L diaphragm and probe body), the CPA-325S offers exceptional resistance to corrosion, mechanical damage, and harsh chemical exposure. With an IP68 protection rating, the probe is fully submersible and built to operate reliably across a wide medium temperature range of –40 °C to +125 °C.
The transmitter covers a broad nominal measurement range from 0…1 mH₂O up to 0…250 mH₂O, making it suitable for everything from shallow collection pits to deep wells and reservoirs. It delivers a standard 2-wire 4…20 mA output, with optional 3-wire configurations available in 4…20 mA, 0…20 mA, 0…5 V, or 0…10 V signals, providing seamless integration with virtually any control or SCADA system.
Accuracy is guaranteed at ±0.35 % of span (with ±0.5 % option), and a wide selection of cable types, PVC, PUR, FEP, or TPE-U, allows tailoring the probe to the chemical and mechanical demands of any installation.
Backed by a 3-year warranty, the CPA-325S is the trusted choice for engineers who need long-term reliability without compromise.
Key Features
Hydrostatic level transmitter for contaminated liquids
Nominal range: 0…1 mH₂O to 0…250 mH₂O
Large Ø76 mm separator with thickened Ø48 mm stainless steel diaphragm
Accuracy from ±0.35 % span
Output: 4…20 mA (2-wire standard); optional 3-wire 4…20 mA / 0…20 mA / 0…10 V / 0…5 V
316L stainless steel diaphragm and stainless steel probe body
Power supply: 8…32 V DC (14…30 V DC for voltage outputs)
Medium temperature: –40 °C to +125 °C
IP68 protection — fully submersible
Cable options: PVC, PUR, FEP, TPE-U
3-year warranty
Typical Applications
Municipal sewers and stormwater systems
Sewage treatment plants
Water recycling and reclamation facilities
Liquid waste collection points
Pumping stations and lift stations
Fermentation chambers and settling tanks
Industrial process tanks containing abrasive or dirty media
